After upgrading from Fedora 25 to Fedora 26 or Fedora 27, Worklog Assistant no longer launches.
This appears to be caused by SSL library inconsistencies that do not seem to occur on a fresh install (vs an upgrade) in certain circumstances. Although we haven't been able to reproduce it, the issue appears to be resolved as follows:
sudo dnf remove openssl-devel
sudo dnf install compat-openssl10-devel